Question

I would like to set time count down, using NSTimer like start with 20 minutes then elapsed 19 min.,18 min etc. (only minutes not seconds) this elapsed time show in text file, Please help.

Thanks in Advance

Answer 1

You will want to create a timer that looks like this:

NSTimer *myTimer = [NSTimer scheduledTimerWithTimeInterval:60 target: self selector:@selector(time:) userInfo: nil repeats: true];
//the timer takes seconds, so by feeding it 60, it will tick every minute

Then your time: function will have to look like this:

- (void)time:(NSTimer *)timerObject{
    //do whatever needs to be done every minute, like updating your UI
    //and subtracting from your counter variable
}

(you do not have to use timerObject)